SIGLENT SSG5000A Series RF Signal Generator User manual

SSG3000A Service Manual 1

Service Manual

SM0805A-E01A

SSG5000A

Signal Generator

SSG5000A Service Manual 1

Guaranty and Declaration

Copyright

Trademark Information

SIGLENT is the registered trademark of SIGLENT TECHNOLOGIES CO., LTD

Declaration

◆ SIGLENT products are protected by patent law worldwide.

◆ SIGLENT reserves the right to modify or change parts of or all the specifications or pricing

policies at company’s sole decision.

◆ Information in this publication replaces all previously corresponding material.

◆ Any way of copying, extracting or translating the contents of this manual is not allowed

without the permission of SIGLENT.

◆ SIGLENT will not be responsible for losses caused by either incidental or consequential in

connection with the furnishing, use or performance of this manual as well as any

information contained.

Product Certification

SIGLENT guarantees this product conforms to the national and industrial standards in China as well

as the ISO9001: 2008 standard and the ISO14001: 2004 standard. Other international standard

conformance certification is in progress.

2 SSG5000A Service Manual

General Safety Summary

Carefully read the following safety precautions to avoid any personal injury or damage to the

instrument and any products connected to it. To avoid potential hazards, please use the instrument

as specified.

Use Proper AC Power Line

Only the power cord designed for the instrument and authorized by local country should be used.

Ground the Instrument

The instrument is grounded through the protective earth conductor of the power line. To avoid electric

shock, please make sure the instrument is grounded correctly before connecting its input or output

terminals.

Connect the Probe Correctly.

If a probe is used, do not connect the ground lead to high voltage since it has isobaric electric

potential as the ground.

Look Over All Terminals’ Ratings

To avoid fire or electric shock, please observe all ratings and label notices on this instrument. Before

connecting the instrument, please read the manual carefully to gain more information about the

ratings.

Use Proper Overvoltage Protection

Make sure that no overvoltage (such as that caused by a thunderstorm) can enter the product, or

else the operator might be exposed to danger of electrical shock.

Electrostatic Prevention

Operate the instrument in an electrostatic discharge protective area environment to avoid damages

induced by static discharge. Always ground both the internal and external conductors of the cable to

release static before connecting.

Maintain Proper Ventilation

Inadequate ventilation may cause increasing of the instrument’s temperature, which will eventually

damage the instrument. So keep well ventilated and inspect the intake and fan regularly.

Avoid Exposed Circuit or Components

Do not touch exposed contacts or components when the power is on.

Do Not Operate Without Covers

Do not operate the instrument with covers or panels removed.

SSG5000A Service Manual 3

Use Only the Specified Fuse.

Keep Product Surfaces Clean and Dry.

To avoid the influence of dust and/or moisture in the air, please keep the surface of the device clean

and dry.

Do Not Operate in Wet Conditions.

In order to avoid short circuiting to the interior of the device or electric shock, please do not operate

the instrument in a humid environment.

Do Not Operate in an Explosive Atmosphere.

In order to avoid damage to the device or personal injury, it is important to operate the device away

from an explosive atmosphere.

4 SSG5000A Service Manual

Safety Terms and Symbols

Terms on the product. These terms may appear on the product:

DANGER: Indicates an injury or hazard that may immediately happen.

WARNING: Indicates an injury or hazard that may not immediately happen.

CAUTION: Indicates that a potential damage to the instrument or other property might occur.

Symbols on the product. These symbols may appear on the product:

Hazardous

Voltage

Protective

Ground

Warning

Earth Chassis

Ground

 
SSG5000A Service Manual                                                                            5 
Contents 
Guaranty and Declaration .................................................................................................................. 1 
General Safety Summary ................................................................................................................... 2 
Safety Terms and Symbols ................................................................................................................ 4 
Preparation Information ..................................................................................................................... 7 
Power-on Inspection ..................................................................................................................... 7 
Interface Test ................................................................................................................................. 8 
USB Host Test ........................................................................................................................ 8 
USB Device Test .................................................................................................................... 9 
LAN Port Test ....................................................................................................................... 10 
Performance Verification Test ......................................................................................................... 14 
10 MHz output accuracy test ...................................................................................................... 14 
Absolute amplitude accuracy test ............................................................................................... 15 
Second Harmonics ...................................................................................................................... 21 
Internal AM modulation test ........................................................................................................ 23 
Internal FM modulation test ........................................................................................................ 25 
Internal ΦM modulation test ........................................................................................................ 27 
Pulse modulation test .................................................................................................................. 30 
LF AC test .................................................................................................................................... 32 
LF DC test ................................................................................................................................... 33 
Assembly Procedures ...................................................................................................................... 35 
Safety Considerations ................................................................................................................. 35 
List of Modules ............................................................................................................................ 36 
Required Tools ............................................................................................................................ 36 
Disassembly Procedures ............................................................................................................ 36 
Remove the Outer Cover ..................................................................................................... 37 
Remove the Channel plate Module ..................................................................................... 38 
Remove the Power Module ................................................................................................. 39 

6 SSG5000A Service Manual

Remove the frequency multiplication plate module ............................................................. 40

Remove the Mechanical attenuator module ........................................................................ 41

Remove the Control Board .................................................................................................. 42

Remove the Main Board ...................................................................................................... 43

Remove the front panel ....................................................................................................... 44

Remove the LCD and Keyboard .......................................................................................... 45

Contact SIGLENT.............................................................................................................................. 46

SSG5000A Service Manual 7

Preparation Information

Before initiating performance verification or any adjustments, it is recommended to follow these

procedures. The following topics are discussed in this chapter.

⚫ How to perform power-on inspection.

⚫ How to perform interface test.

For more detailed information about the signal generator operation, please refer to the SSG5000A

User Manual.

Power-on Inspection

The normal operating voltage for SSG5000A series signal generator is in the range of 100-240

VRMS, 50/60Hz or 100-120 VRMS, 400Hz.

Please use the power cord provided in the accessories to connect the instrument to the power

source as shown in the figure below.

Power

Interface

Figure 1 Connect power cord

Note: To avoid electric shock, make sure that the instrument is correctly grounded

to the earth before connecting AC power.

Press the power-on button located at the lower left corner of the front panel and several keys will

illuminate for about 6 seconds. Then, the boot screen will appear on the display.

8 SSG5000A Service Manual

The front and rear panels are shown in the figures below.

Figure 2 Front Panel

Figure 3 Rear Panel

Interface Test

The SSG5000A series signal generator is designed with three standard interfaces: USB Host, USB

Device and LAN. Being connected to other instruments via these interfaces enables the signal

generator to achieve additional capabilities. To ensure the signal generator is working properly, it is

recommended to test the interfaces first.

USB Host Test

To test if the USB Host interface is working normally.

Tools:

⚫ USB memory device (U disk)

SSG5000A Service Manual 9

Steps:

1. Insert a U disk into the USB Host interface on the front panel of the signal generator.

2. An icon shaped like a U disk appears on the upper right corner of the screen, as shown in figure

below. The appearance of the icon indicates the U disk has been successfully recognized.

Figure 4 USB drive has been properly recognized

USB Device Test

To test if the USB Device interface is working normally.

Tools:

⚫ A computer with USB interface that is compatible with running National Instruments NI-MAX

software

⚫ A standard USB cable (Type A-B)

⚫ NI-MAX software

Steps:

1. Download and install National Instruments NI MAX software by following the installation

instructions provided by National Instruments.

2. Connect the signal generator USB Device port and the computer with an USB cable.

3. Run NI MAX software. Click “Device and interface” at the upper left corner of the NI software

10 SSG5000A Service Manual

interface and it immediately displays the “USBTMC” device symbol.

4. Click “Open VISA Test Panel”, and then the VISA Test Panel as shown in the following picture

will appear. Then click the “Input/Output” option button on the VISA Test Panel and click the

“Query” option button to view the Read operation information.

LAN Port Test

To test if the LAN interface is working normally.

Tools:

⚫ A computer with functional LAN interface

⚫ A standard LAN cable

Steps:

SSG5000A Service Manual 11

1. Connect the signal generator and the computer with a LAN cable via LAN interface.

2. Press UTILITY -> Interface , and set DHCP State ON, as shown in the following figure.

The signal generator will set IP Address, Subnet Mask and Gateway automatically in this

network.

3. Write down the displayed IP address. It will be used in later steps.

Figure 5 IP configuration interface

4. Run NI Max software. Click “Device and interfaces” in the upper left corner of the NI software

interface, select “Network Devices”, “Add Network Device”, and select “VISA TCP/IP Resource”

as shown:

5. Select Manual Entry of LAN instrument, click “Next”, and enter the IP address as shown in the

following figures. Click Finish to establish the connection.

12 SSG5000A Service Manual

Note: Leave the LAN Device Name BLANK or the connection may fail.

6. After a brief scan, the connection will be shown under Network Devices:

SSG5000A Service Manual 13

7. Right-click on the product and select Open VISA Test Panel.

8. Click the “Input/Output” option button on the VISA Test Panel and click the “Query” option button

to view the Read operation information.

Note: The *IDN? Command (known as the Identification Query) should return the instrument

manufacturer, instrument model, serial number, and other identification information.

14 SSG5000A Service Manual

Performance Verification Test

This chapter explains testing the signal generator in order to verify performance specifications. For

accurate test results, please let the test equipment and the signal generator warm up 30 minutes

before testing.

Below is the required equipment:

Table 1 Test equipment

Equipment

Specification

Qty.

Recommended

Signal Analyzer

20Hz ~ 26.5 GHz

1

Keysight N9020

Power Meter

40GHz

1

R&S NRP40T

Frequency Counter

10 MHz

1

53220A

N-2.92mm Cable

20GHz

1

BNC Cable

2 GHz

1

10 MHz output accuracy test

Specification

Reference frequency

10.000000 MHz

Initial calibration accuracy

< 100 ppb

Test Connection Diagram

10MHz OUT

SSG5000A 53220A

SSG5000A Service Manual 15

Test Procedures

1. Connect [ 10MHz OUT ] port of the signal generator to the channel A of the 53220A.

2. Set the 53220A to frequency counter mode, and set frequency ref to 10.000000 MHz

3. Check if the frequency deviation ≤ 100ppb

Test Record Form

Frequency

Frequency Deviation

Pass/Fail

10.000000 MHz

Absolute amplitude accuracy test

Specification

Level error (ALC on, temperature is 20 ℃ ~30 ℃)

Frequency (f)

Max

performance

power to 13

dBm

13 dBm ~

-20 dBm

-20 dBm ~

-90dBm

-90 dBm ~

-110 dBm

-110 dBm ~

-120 dBm

9 kHz ≤ f <100 kHz

≤ 0.7 dB

≤ 1.1 dB

100kHz ≤ f <1MHz

≤ 0.7 dB

≤ 1.1 dB

1MHz ≤ f ≤ 4 GHz

≤ 1dB

≤ 0.7 dB

≤ 1.1 dB

≤ 2 dB

4 GHz < f ≤ 6 GHz

≤ 1dB

≤ 0.7 dB

≤ 1.1 dB

≤ 2 dB

6 GHz < f ≤ 13.6 GHz

≤ 1dB

≤ 0.7 dB

≤ 1.1 dB

≤ 2 dB

13.6 GHz < f ≤ 20 GHz

≤ 1dB

≤ 0.7 dB

≤ 0.9 dB

≤ 1.1 dB

≤ 2 dB

Test Devices

1. Power Meter × 1

2. SMA-2.92mm Adaptor × 1

3. Dual-BNC Cable × 1

4. Signal generator × 1

16 SSG5000A Service Manual

Test Connection Diagram

RF OUTPUT

NRP40T

(a)

RF OUTPUT

N-2.92mm Cable

RF INPUT

Ref IN

10MHz OUT

(b)

Figure 6 Absolute amplitude accuracy connections

Test Procedures

1. Connect the RF output terminal of the SSG5000A with the power meter, as shown in Figure 6

(a).

2. Set the SSG5000A to output a sine waveform with -10 dBm amplitude. Then modify the output

frequency of the SSG5000A according to Table 2 and enable the RF output.

3. Modify the frequency of the power meter accordingly each time the output frequency of the

SSG5000A is modified. Read the amplitude measurement value A1 and record it to the test

record form.

4. Disconnect the SSG5000A and the power meter. Connect the [ 10 MHz OUT ] terminal of the

signal analyzer with the [ EXT REF IN ] terminal at the rear panel of the signal generator using a

dual-BNC cable to synchronize the two instruments.

SSG5000A Service Manual 17

5. Connect the [ RF OUTPUT ] terminal of the SSG5000A with the input terminal of the signal

analyzer using a dual-N cable as shown in Figure 6 (b).

6. Configure the signal analyzer:

1) Set the self-calibration to normal and perform all of the calibration items

2) Select the external frequency reference input.

3) Set the span to 100 Hz.

4) Set the reference level to -20 dBm.

5) Set the input attenuation to 10 dB.

6) Set the resolution bandwidth to 1 Hz.

7. Set the output frequency of the SSG5000A and the center frequency of the signal analyzer

according to Table 2 (the center frequency of the signal analyzer corresponds to the output

frequency of the SSG5000A).

8. Each time the center frequency is changed, wait for the signal analyzer to finish a sweep and

then press Peak Search to find the maximum peak. Read the peak value A2 and record it to the

test record form.

9. System Error (the input attenuation of the signal analyzer is 10 dB) = A2 - A1 and record the

measurement result.

10. Keep the connection shown in Figure 6 (b) unchanged. Press Mode Preset to restore the signal

analyzer to its factory setting and set the output amplitude of the SSG5000A according to Table

3.

11. Each time the output amplitude is changed, set the output frequency of the SSG5000A and the

center frequency of the signal analyzer according to Table 2 (the center frequency of the signal

analyzer corresponds to output frequency of the SSG5000A).

12. Each time the center frequency is changed, wait for the signal analyzer to finish a sweep and

then press Peak Search to find the maximum peak. Read the peak value A3 and record it to the

test record form.

Note: when the output amplitude of the SSG5000A is -10 dBm, the measurement result A3,

namely, is the measurement value A2 of the signal analyzer in step 8.

13. Calculate the Global Error = A3 - Reference Value and record the result.

14. Calculate the amplitude accuracy using the formula Amplitude Accuracy = |Global Error -

System Error| and compare the calculation result with the specification.

18 SSG5000A Service Manual

Table 2 Output Frequency of the SSG5000A

Output Frequency

103

kHz

1.33

MHz

51.33

MHz

533

MHz

1.933

GHz

2.433

GHz

2.933

GHz

3.933

GHz

4.933

GHz

5.933

GHz

7.933

GHz

9.433

GHz

11.933

GHz

13.933

GHz

15.933

GHz

17.933

GHz

19.933

GHz

Note: When the frequency of the signal measured is less than 10 MHz, make certain the signal

analyzer is in the DC coupling mode to ensure the measurement accuracy.

Table 3 Output Amplitude of the SSG5000A

Output amplitude

-10 dBm

-50 dBm

-90 dBm

-120 dBm

Test Record Form

SSG5000A Output

Frequency

Power Meter

Measurement Value A1

Signal Analyzer

Measurement Value A2

System

Error

103 kHz

1.33 MHz

51.33 MHz

533 MHz

1.933 GHz

2.433 GHz

2.933 GHz

3.933 GHz

4.933 GHz

5.933 GHz

7.933 GHz

9.933 GHz

11.933 GHz

13.933 GHz

15.933 GHz

17.933 GHz

19.933 GHz

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SIGLENT SSG5000A Series RF Signal Generator User manual

SIGLENT SSG5000A Series RF Signal Generator User manual

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